Browsing by Author "TAM, MT"

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A STUDY ON ACOUSTIC-EMISSION CHARACTERISTICS OF FLY-ASH CEMENT MORTAR UNDER COMPRESSION
(1994)
TAM, MT
;
WENG, CC
;
交大名義發表
;
土木工程學系
;
National Chiao Tung University
Acoustic Emission (AE) monitoring of the integrity of material has been widely regarded as a potentially new nondestructive testing method. This study is devoted to the investigation of AE characteristics of fly ash cement mortar (FACM) under uniaxial compression. The test results of 72 specimens were reported. The major experimental parameters include the AE signals, the amount of cement replaced by fly ash, compressive strength, strain and age of the FACM. The test results showed that the characteristics of the detected AE signals during the compression process contain potentially useful information for judging the stability of the specimens under compression. Good correlation between the AE signals and the major parameters of FACM was observed. Also, a study on the AE Kaiser effect showed that Kaiser effect existed in FACM up to 80% of its ultimate strength.
ACOUSTIC-EMISSION CHARACTERISTICS OF MORTAR UNDER COMPRESSION
(1992-07-01)
WENG, CC
;
TAM, MT
;
LIN, GC
;
交大名義發表
;
土木工程學系
This research is devoted to the study of the characteristics of acoustic emission (AE) signals of mortar under uniaxial compression. A total of 40 specimens were tested, in which the water-cement ratio, age, compressive strength and strain were the major parameters of mortar related to the AE signals. In addition, different compressive modes were used in the tests in order to investigate the AE Kaiser effect in mortar. From the test results, good correlation between the AE signals and the major parameters of mortar was observed. The experimental findings may provide useful information for further understanding of the AE characteristics of concrete and reinforced concrete.
ACOUSTIC-EMISSION KAISER EFFECT IN FLY-ASH CEMENT MORTAR UNDER COMPRESSION
(1995-11-01)
TAM, MT
;
WENG, CC
;
交大名義發表
;
土木工程學系
;
National Chiao Tung University
Acoustic-emission (AE) technology is considered a potential new testing method to monitor the integrity of concrete materials, This study is devoted to the investigation of the AE Kaiser effect in fly-ash cement mortar (FACM) under uniaxial compression. The major experimental parameters include the amount of cement replaced by fly ash, curing time, compressive strain and stress, loading pattern, and loading rate. The test results showed that the AE Kaiser effect existed in FACM specimens up to 80% of its ultimate strength. Good correlation between the variation of the AE signals and the compressive strains was observed. In addition, the results indicated that the AE Kaiser effect existed in FACM specimen during different curing periods of three, seven, 14, and 28 days. These observations suggested that the AE Kaiser effect has good potential to be used as a new tool to monitor the loading history of concrete materials.